The term loose leaf is used in the United States and some other countries to describe a piece of notebook paper which is not actually fixed in a spiral notebook. In some places, like the United Kingdom, the phrase loose leaf refers more to the flexible system of storing loose pages in a binder than to the actual paper.
Typically loose leaf paper has straight blue lines with pink margin lines. This type of paper is normally sold in packs of 100 or 200 sheets and are not necessarily sold loose which means they can be torn out of notebooks with perforations. Loose leaf generally has three holes so that the piece of paper can fit into a three-ringed binder.
Most of the time, loose leaf paper comes in two types, which are either wide ruled or college ruled. These two types vary in the way that wide ruled paper has more space in between the blue lines, leaving more room for writing. Wide ruled paper is used more by grade school children and those with larger handwriting.